Watch BodhaGuru Educational Videos for Class Eight

Biology Physics Chemistry Maths

Biology             

Crop Production And Management

The lessons in this topic explain how the crop is produced and managed using different practices and implements, e.g. different types of crops, what things are necessary for good crop, crop storage etc.

Cell

The lessons in this topic explain the structure and functions of a cell - the basic unit of life. It describes about shape, size, functions and the internal structure of cell.

Microbes - Friend And Foe

The different lessons in this topic explain the different types of microbes (e.g. fungi, bacteria, viruses, and protozoa).It also explains how some microbes are useful, while others are harmful to human beings.

Reproduction In Animals

The different lessons in this topic explain the two common ways of animal reproduction - asexual and sexual) and the various animal life cycles (e.g. frog, butterfly etc.). It begins with an interesting story - The Crow and Jackal Friendship.

Reaching The Age Of Adolescence

The lessons in this topic describe about the physical changes in body that a child undergoes when he/she reaches the age of adolescence. It also describes the role of hormones in these changes and what these changes mean.

Conservation Of Plants And Animals

The different lessons in this topic explain the importance of forests and how plants are animals are being conserved in various protected areas. It also puts light on issues we are facing due to deforestation like soil erosion, shortage of water, changing climate etc.

Physics             

Force And Pressure

The different lessons in this topic explain the difficult concepts of force e.g. what is force, what force can do and pressure (both liquid pressure and atmospheric pressure) in a simple and easy way.

Friction

The different lessons in this topic explain about friction and its types.It also explains that friction is a necessary evil.

Sound

The lessons in this topic explain what sound is, how it is produced and how it travels from one place to another place. It also explains why different instruments produce different kind of sound. The lessons give clear ideas about various characteristics of sound and terms related to sound e.g. amplitude, pitch, frequency, echo etc. It starts with a beautiful story - ‘Life Is An Echo’.

Light

The various lessons in this topic explain about reflection by plane mirrors. It also explains reflection of light, laws of reflection, how eye works etc.

Some Natural Phenomena

The lessons in this topic explain the natural phenomena - lightning and earthquake. It elaborates the safety measures that should be taken during natural calamities.

Solar System and Space

The different learning content in this topic give the overview of the solar system (e.g. the sun, moon and the eight planets including the earth), comets, stars, meteors, meteorites etc. It starts with an adventurous story - Live and Let Live.

Moon And Tides

The different learning content in this topic help the children to understand the phases of the moon (e.g. no moon, crescent moon, full moon etc.). It also explains the phenomenon of tides due to the position of moon.

Rocket and Satellite

The different learning content in this topic explain in detail how a rocket and various types of satellites are launched into the space and how satellites keep revolving around the earth in a fixed orbit.

Chemistry             

Synthetic Fibres and Plastics

The different lessons in this topic explain about various synthetic fibres. It also talks about plastic and explains how plastic is destroying environment and how can we fix it.

Metal And Non-metals

The lessons in this topic explain about physical and chemical properties of metals and non-metals and differences between them.

Coal And Petroleum

The different lessons in this topic explain about coal and petroleum, their usage and how they were formed.

Combustion And Flame

The different lessons in this topic explain when and how combustion occurs. It describes the combustion process and explains about fuel and flames.

Chemical Effects Of Electric Current

The different lessons in this topic explain about chemical effects of electric current and electrolysis process. It also explains electroplating - application of electrolysis.

Pollution And Water

The different learning content in this topic explain various types of pollution, it causes and effects (e.g. air, water, noise etc.). It begins with a fascinating story - Pradushamaan, which teaches us that pollution can be like a monster if not controlled soon.

Maths             

Rational Number

The different lessons in this topic explain what rational numbers are, their properties, how to represent different rational numbers on a number-line and compare. It also explains about conversion between rational number and decimals, standard form of rational numbers, rational-irrational numbers. It shows how to perform basic arithmetic operations on all the rational numbers.

Base and Exponent

The lessons in this topic explain what exponent is and how to express a number in exponential form. It explains how to read, write numbers in exponential form, value of number with negative base, value of number having power of power. It describes how to add-subtract, divide-multiply numbers in exponential form. It starts with a nice witty story - Gold or grain.

Squares and Square root

The different lessons in this topic explain properties of perfect square numbers. It also explains how to find square and square root of a number

Cubes and Cube root

The different lessons in this topic explain how to find cube and cube root of a number

Algebraic Expression

The lessons in this topic explain about algebraic expression. It describes how to form polynomial algebraic expression, elements in algebraic expression, how to solve such expressions. It explains about like-unlike term, degree of polynomial etc. It also explains how to do addition and subtraction with variable and algebraic expression. It starts with an inspiring story of two friends - A helping hand.

Standard Identities

The different lessons in this topic explain about standard indentities of algebraic expression.

Ratio

The lessons in this topic explain what ratio is and how to compare quantities using ratio, how to find simplest form of ratio and equivalent ratio. It starts with a short nice story for children - How Much Milk, How Much Water.

Proportion

The lessons in this topic explain what proportion is and how it is related to ratio. It explains how to find whether two ratios are in proportion or not and elaborates the properties of proportion.

Direct and Inverse Proportion

The different lessons in this topic explain the concept of direct and inverse proportion using practical real-life examples.

Profit and Loss

The lessons in this topic explain the concept of profit and loss and its importance in daily life and business. It also explains how to calculate profit and loss. It starts with nice story - Raheem’s Tasty Food, which would be helpful to understand the topic.

Percentage

The different lessons in this topic explain what percentage is and its use in real life. It elaborates how to find percentage. It explains the concept of percentage of loss or profit in business and how it is calculated. It starts with a funny story - Ssshhh! Don’t tell anyone.

Tax

The different lessons in this topic explain the concept of tax and its use. It explains the sales tax i.e. value-added tax in detail.

Simple Interest

The different lessons in this topic explain the concept of simple interest. It explains the concept of simple interest. It elaborates how to find simple interest. It explains the significance of simple interest in real life. It starts with an inspiring story - Hoshiyarpur becomes self-reliant.

Compound Interest

The different lessons in this topic explain the concept of compound interest. It explains how to calculate compound interest. It also elaborates the compounding factor in compound interest.

Data Handling

The lessons in this topic explain concepts show how to collect and represent data using tally marks, pictograph, bar graph etc. It starts with an entertaining detective story for children - Whole stole the eggs.

Making Graphs and Charts

The lessons of this topic explain how to express data through graph or chart. It explains how to make a line graph and how to select the right graph for representing data.

Probability

The different lessons in this topic explain what probability is. It describes how to measure probability of an event. It explains about sample space, how to measure probability of event from experiment. It gives definition of most likely, sure and impossible event from probability point of view. It starts with an inspiring story - Uncle’s dice.

Polygon

The different lessons in this topic explain about line, curve, open and closed figure and then it explains what polygons are, elements of polygons.

Quadrilateral

The different lessons in this topic explain about elements and properties of a quadrilateral. It explains about parallelogram and its properties. It explains which quadrilaterals are parallelogram and why.

Quadrilateral Advanced

The different lessons in this topic explain about advanced properties of a polygon, quadrilateral and parallelogram.

Geometry - Area

The lessons in this topic explain how to measure area. It shows how area of parallelogram is measured. It explained the way formula is derived. It also shows how formula of area of circle, trapezium are derived. It describes how to measure area of different triangles and how these formulas are derived.

Mensuration - Volume and Surface Area

The different learning content in this topic explain what volume means. It also expalins how to derive the formula for the volume of a solid shapes like cuboid and a cube. It also explains how the surface area of cube, cuboid and cylinder is calculated.

Shapes

The different learning content in this topic explain what a 3D figure means and its properties. It expalins the difference between 2D and 3D figures. It also expalins how to get a 3D shape out of a given 2D shape.

Drawing Solids

The different lessons in this topic explain how a solid shape looks different from different angle. It describes why view angle is important in real life and how wrong viewing angle may cause mistake. It also describes how to draw 3D object expressing its depth and how drawings of a solid shape from different view point differs.

Playing With Numbers

The lessons in this topic teach how to test whether the given number is divisible by 2, 3, 4, 5, 6, 8, 9, 10 or 11.
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